Biology · Environmental Issues
The concentration of dissolved oxygen (DO) is a critical indicator of water quality. At what DO level do most fish species become rare or begin to die?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 17 to 8 ppm
- 26 to 7 ppm
- 35 to 6 ppm
- 44 to 5 ppm✓
Correct answer
4 to 5 ppm
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